roming-er



(No Model.)

4 Sheets-f-Sheet l. G. S. ROMINGER.

SEWING MACHINE.

vin): 256,743.

Patented Apr. 18, 1882.

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N. PETERS. Phnm-Llmugmplwr, wamingwn, C. c.

(No Model.) 4 sheets--sneety 2.

G. S. ROMINGER.

SEWING! MACHINE.

No. 256,743. Patented Apr.18,1882.

4 Sheets-Sheet 3,

(No Model.)

G. S. ROMINGER.

SEWING MACHINE.

No. 256,743. .Patented Ap1.18,1882.

(No Model.) 4 Sheets-Sheet'4. G. S. ROMINGER.

SEWING MACHINE. No. 256,743. Patented Apr. 18,1882.

N, PETERS, Phnlvuxhngnpnbr, vlamingen. D. C.

UNrrnn Sra-ras .Parana l rtree.

GEORGE S. ROMINGER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR vTO THEAMERICAN BUTTONHOLE, OVERSEAHING AND SEWING MACHINE COMPANY, OF SAMEPLACE.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 256,743dated April 18,V1882.

Application filed February 18, 1882.

(No model.)

To all whom yit lmay concern Be it known that I` GEORGE S. ROMINGER, acitizen of the United States, residingin Philadelphia, Pennsylvania,have invented certain Improvements in Sewing-Machines, ot' which thefollowing is a specification.

My improvements in sewing-machines consist, iirst, of certain mechanismfor regulating the extent ot' the take-up of the needleio thread;secondly, of certain mechanism for actuating the shuttle-lever from thedrivingshaft; thirdly, ot'mechanism whereby the feedlever is hung insuch a manner that it is free to be vibrated laterally and vertically;fourthly, of an improved tension device; and, ifthly,

ol' an improvement in shuttle-'drivers forlessening the noise due totheir operation.

In the accompanying drawings, Figure 1, Sheet 1, is a vertical sectionof a sewingina- 2o chine with my improvements; Fig. 2, Sheet 2,

an inverted plan view; Fig. 3, a vertical section on the line l 2, Fig.l; Fig. 4, Sheet 3,4 an elevation of the front end of the machine; Fig.5, a vertical section on the line 3 4, Fig.

1; Fig. (i, a perspective view of a wire bent to form thread-guides 5Fig. 7, perspective views of detached parts appertaining to the takeupmotion; Fig. 8, perspective views of the shuttlc-carrier; Fig. 9, Sheet4, a vertical section 3o on the line 5 6, Fig. l; Figs. 1() and 11, de-

tached perspective views of parts composing the device shown in Fig. 9;Fig. 12, a vertical section ofthe device for imparting tension to theneedle-thread, and Fig. 13 a perspective view, drawn to an enlargedscale, ot part of Fig. 12.

Referring to Fig. 1, Sheet 1, A is the bedplate of the machine; B, thehollow standard, which is secured to the bed-plate, and from 4o whichprojects the stationary arm B', terminating in the head D.

E is the driving-shaft, from which a vibra-ting motion is imparted tothe shuttle-driving lever F by mechanism explained hereinafter.

G is the feed-motion lever operated from the shaft E; and H is theneedle-bar secured to a guided cross-head, I, to a curved groove, in theback ot' which is' adapted a pin on th crank-wheel J of thedriving-shaft.

I will in the first instance describe the posi- 5o tive take-up motionillustrated in Figs; l and 5, Sheet 3, on reference to which it will beseen that the needle-bar is arranged to re- -ciprocate in bearings inthe head D of the stationary arm, the cross-head I ofthe needlebarbeing'in the present instance guided and steadied by the presser-bar, asdescribed in Patent No:242,372, granted to my assignees on the 31st. dayof May, 1881. To this crosshead, or, it' found more convenient, to thenee- 6o ille-bar itself, is pivoted a lever, K, one arm ot' whichprojects through a vertically-elongated opening in the side ot' the headD, and has at its outer end an eye, d, to which the needlethread isadmitted through a slot shown in Fig. 7. The needle-thread passes fromthe tension device, referred to hereinafter, through a thread-guide, c,Fig. 4, downward to the guidef, upward and through the eye l ofthe leverK, downward to the guide f', and thence 7o through a guide at the lowerend of the needle-bar to the eye ot' the needle. The take-up lever K,being carried by the needle-bar or its cross-head, has a verticalreciprocating motion; but this would not be of sufficient extent to takeup the thread unless the movement of the needle-bar should be moreextended than circumstances demand, and an extended stroke oftheneedlebar is objectionable for reasons well known to constructors andoperators of 8o sewing-machines. For these reasons a motion on its pivotindependent ot' its reciprocating motion is imparted to the lever, sothat it will take up at the proper time the required amount ot' slackthread. This motion is produced in 85 the present instance by the aid ofthe plate L, which has a curved slot, lz., adapted to receive a pin onthe short arm ofthe lever K, so that as the latter reciprocates with theneedle-bar it will be vibrated on its pivot, the slot being of 9o such ashape as to properly time the vibration of the lever in respect to themovement ofthe needle-bar for the proper taking up of the thread.

The plate L may be fixed; but I prefer to make it adjust-able, so thatthe movement of the take-up lever may be regulated to suit therequirements of different thicknesses of fabric 2 i! eeen-ra to besewed. This adjustment is effected in the present instance by pivotingthe plate at z' to the front plate, b, of the head D of the stationaryarm, a screw-stud,j, projecting from the upper end of the plate Lthrough a curved slot, L", in the plate b, and being furnished with anut, m, for securing the plate L after it has been adjusted.

Fig. 6 illustrates the manner of forming the thread-guides ff' bybending` a wire, M, in the middle to form a loop, and bending it nearthe ends to form the guides, the bent endsdfsingattached to the frontplate, b, of the stationary arm of the machine.

The mechanism throughthemedium of which the shuttle-lever Ffis opera-tedfrom the driving-shaft E can be best explained by reference to Figs. l,9, 10, and 11.

Within the standard B is pivoted a bellcrank lever, N, to the short armn of which is connected the lower end of the eccentric-rod N', the upperend of the latter embracing an eccentric, n', on the driving-shaft. Thelower end of the long arm g of the bell-crank lever "N is connected tothe shuttle-lever F in the following manner: The said shuttlelever isforked as shown in Fig. 1], so as to present two projections, p p, tothe inner side of each of which is secured a hardened-steel plate, q,and between the two plates lits snugly, but so as to slide freely, acylindrical block, F, also of hardened steel. The lower end of the longarm g of the lever N is beveled and adapted to a countersunk orihce inthe upper side of the cylindrical block, a screw, t, passing upwardthrough the block and into the arm, and having a beveled head adapted toa countersunk recess in the under side of the block. As the arm gvibrates in the direction of the arrows, Fig. 9, the block mustnecessarily slide vertically to a limited extent between and in contactwith the hardened-steel plates q q. The block controlled by the arm gmust also oscillate to a limited extent between the plates, and, owingto the vibration of the forked end of the shuttle-lever in the are ot' acircle, the block must reciprocate in the forked end of the lever, andmust oscillate to a very limited extent on the end of the arm g. It willbe seen that ample provision is made for thefreedom of these movements.

A. portion of the shuttle-lever is severed, as shown in Fig. 11, and aset-screw, p', passing through this severed portion, serves to contractthe forked end of the lever when the block becomes loose between theplates q q.

The forked end of the lever may be hardened, so as to dispense with thesteel plates; but l prefer to use the latter.

The severed ring forming the lower end of the eccentric-rod N' isadapted to the portion d of the pin Q, Fig. 10, the eccentric portion .aof the latter iitting into the severed ring formingthe end of the shortarm n of the lever N. By loosening a set-screw, u, the short arm of thelever will loosen its hold of the pin,

and the latter can bc turned to any desired extent, after which it maybe again secured to the short arm of the lever by turning the said screwu. By the adjustment of this pin I am enabled to alter the relation toeach other of the levers NN', and consequently to determine the path inwhich the shuttleshall vibrate in respect to the needle.

It will be seen on referring to Figs. 1 and 3 that the lshuttle-lever Fis pivoted to a pin, F', secured to the under side of the base-plate,the bearing of the feed-lever G being immediately below theshuttle-lever. It is essential that this feed-lever should' admit ofbeing vibrated both laterally and vertically. Vhile it mightbe-connected by a universal joint to the pin F', I prefer to utilize thehub f2 ot' the shuttlc-lever in the following manner: This hub isreduced in diameter for receiving a ring, o, Fig. 3, which is confinedto its place by a washer and nut, h'. The feed-lever G has a recess,71,2, into which the hubf2 and the ring e extend, and the saidfeed-lever is provided with set-Screws 'U' o', the points of which areadapted to recesses in the ring. This device forms a universal joint, asthe feed-lever can vibrate horizontally with the ring on the hub of theshuttle-lever and vertically with its pivotpins fv' e' on the ring,which might be adapted to the pin F', but, as bet'ore remarked, I preferto apply it to the hub of the shuttlelever.

It has not been deemed necessary to describe the mechanism for operatingthe feed-lever from the driving-shaft', as it may be the saine as thatfor which Letters Patent No. 237,704: were granted to my assignees onthe15th day of February, 1881.

The tension device for imparting tension to the needle-thread is shownin Figs. 1,12, and 13, and consists of a spring-plate, W, looselyconnected at one end to an arm, w, on the stationary arm of the machine,Aand caused to bear at its opposite end by means of a setscrew, y, withmore or less force on the thread as it passes in contact with the top ofanother arm, fw'. This a well-known device, on which I have made animprovement, which can be best described on reference to the enlargedperspectiveview, Fig.l3. A plate,W', isloosely connected to the arm w',so that it is at liberty to move in every direction and accommodateitself to the spring-plate, so that the parallelism of the plate W' withthe spring-plate and uniformity of friction, and consequent uniformityof tension on the thread, will always be assured.

Different modes of loosely connecting the plate W' with the arm w' willreadily suggest themselves. In the present instance there is a lug onthe under side of the plate, and a loose pin passes through the arm andluO.

Heretofore in connection with tension devices of the class to which theimprovement relates it has been the practice to use an eye, throughwhich the thread had to be passed.

ICO

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In order to obviate the threading of this eye I use a simple-.hook,g/,into which the thread can be promptly introduced,the character andposition of this hook being too clearly shown in Figs. 12 and 13 to needdescription.

Shuttle-drivers of different shapes, according to the conformation ofthe shuttle, have always projections or lips, one for striking one end,and the other for striking the other end, of the shuttle; and as theshuttle must always be loose between the projections or lips more orless noise must always accompany the action of the driver on theshuttle. I have ascer- -tained that this noise may be materiallydiminished by discarding the usual driver of solid metal and so makingit of two parts that although one lits comparatively close to the otherthe sound due to the striking of the shuttle will be partially absorbedor deadened. In the machines to which my improvements relate it has beenusual to secure a shuttle-driver of the shape shown in Fig. Sto theendof the shuttle-lever. This driver T has lips 2 2, which, together withthe ledge 3, forma loose pocket for the shuttle. Instead of making thisdriver ofone solid piece of metal. as usual, I make it in two parts, thepart T' fitting into the corresponding part T and the projections 4 etof both being attached to the end of the shuttlelever. Although the twoparts fit together snugly enough to make an available shuttledriver,they must necessarily be free from absolute contact with each other atone or more points, and hence, for well-known reasons,the rattling noisecaused by the lips striking the shuttle will be materially diminished.It is not essential, however, in carrying out this feature ofmyinvention that one part ofthe driver ,should be the counterpart of theother, for the same or approximately the same end could be attained byany such application to the shuttlc-driver of a plate or plates as wouldhave a tendency, by their contiguity to the driver, to deaden therattling noise.

I claim as my inventionl. The combination of the needle-bar or crossheadand its pivoted take-up lever with the adjustable slotted plate L and adevice for securing thc said plate after adjustment, substantially asdescribed.

2. The combination oi' thc arm g and mechanism for vibrating the samewith the shuttlelever F, provided with projectionsp p, having planeinner faces, and the cylindrical block l?, adapted to slide andoscillate between the projections and on the lower end of the said armg, substantially as specified.

3. The combination of the arm g, having a beveled lower end,thccylindricalblock I?, having an opening, with conntersunk ends, thesetscrew t, having a beveled head and the shuttlc-lever havingprojections p p for embracing the block I),as set forth.

et. The combination of the rod N, actuated by the driving-shaft, andthelever N, pivoted to the frame of the machine, with a connecting-pin,Q, having two portions, a and a', the former eccentric in respect to thelatter, one portion being adapted to the said rod N and the other to anarm of the lever N, all substantially as set forth.

5. The combination of the feed-lever Gr, its recess h2, and pivot-pins'u' e with the shuttle-lever, its hubfz, and ring a, extendinginto therecess, all substantially as set forth.

6. Atensiondevice in which two xed arms, fw w', and a spring-plate, W,loosely connected to the arm w and acted on by a set-screw, are combinedwith a plate, W', having a projection tting in an orifice in the arm w',to which the said projection is loosely connected by a pin, allsubstantially as described.

7. The combination of the arms w fw and the plates W and W', of thetension fdevice and a thread-guiding hook, y', situated at the rear andclear of said plate IV', as speciled.

S. The shuttle-driverconsisting of two metal plates, T T, conformingsubstantially with each other and constructed for attachment to theshuttle-lever, as set forth.

In testimony whereofIhave signed my name to this specilication in thepresence of two subscribing witnesses.

GE-o. s. ROMINGER.

Witnesses:

HARRY DRURY, HARRY SMITH.

